Add Alex_MP-20_train files

README.md

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+---
+configs:
+- config_name: default
+  data_files: "co/*.parquet"
+- config_name: info
+  data_files: "ds.parquet"
+license: cc-by-4.0
+tags:
+- molecular dynamics
+- mlip
+- interatomic potential
+pretty_name: Alex MP-20 train
+---
+### <details><summary>Cite this dataset </summary>Zeni, C., Pinsler, R., Zügner, D., Fowler, A., Horton, M., Fu, X., Wang, Z., Shysheya, A., Crabbé, J., Ueda, S., Sordillo, R., Sun, L., Smith, J., Nguyen, B., Schulz, H., Lewis, S., Huang, C., Lu, Z., Zhou, Y., Yang, H., Hao, H., Li, J., Yang, C., Li, W., Tomioka, R., and Xie, T. _Alex MP-20 train_. ColabFit, 2025. https://doi.org/10.60732/8d6afc67</details>  
+#### This dataset has been curated and formatted for the ColabFit Exchange  
+#### This dataset is also available on the ColabFit Exchange:  
+https://materials.colabfit.org/id/DS_uluw9723f2n4_0  
+#### Visit the ColabFit Exchange to search additional datasets by author, description, element content and more.  
+https://materials.colabfit.org
+<br><hr>  
+# Dataset  Name  
+Alex MP-20 train  
+### Description  
+The train split of the dataset Alex_MP-20. This dataset contains structures from the Alexandria (Schmidt et al. 2022) and MP-20 (Materials Project 2020) datasets. Data has been modified as follows: Exclude structures containing the elements Tc, Pm, or any element with atomic number 84 or higher. Relax structures with DFT using a PBE functional in order to have consistent energies. For the training set, remove any structure with more than 20 atoms inside the unit cell. For the training set, remove any structure with energy above the hull higher than 0.1 eV/atom.  
+### Dataset authors  
+Claudio Zeni, Robert Pinsler, Daniel Zügner, Andrew Fowler, Matthew Horton, Xiang Fu, Zilong Wang, Aliaksandra Shysheya, Jonathan Crabbé, Shoko Ueda, Roberto Sordillo, Lixin Sun, Jake Smith, Bichlien Nguyen, Hannes Schulz, Sarah Lewis, Chin-Wei Huang, Ziheng Lu, Yichi Zhou, Han Yang, Hongxia Hao, Jielan Li, Chunlei Yang, Wenjie Li, Ryota Tomioka, Tian Xie  
+### Publication  
+https://doi.org/10.1038/s41586-025-08628-5  
+### Original data link  
+https://github.com/microsoft/mattergen  
+### License  
+CC-BY-4.0  
+### Number of unique molecular configurations  
+540162  
+### Number of atoms  
+5184565  
+### Elements included  
+Ag, Al, As, Au, B, Ba, Be, Bi, Br, C, Ca, Cd, Ce, Cl, Co, Cr, Cs, Cu, Dy, Er, Eu, F, Fe, Ga, Gd, Ge, H, Hf, Hg, Ho, I, In, Ir, K, La, Li, Lu, Mg, Mn, Mo, N, Na, Nb, Nd, Ni, O, Os, P, Pb, Pd, Pr, Pt, Rb, Re, Rh, Ru, S, Sb, Sc, Se, Si, Sm, Sn, Sr, Ta, Tb, Te, Ti, Tl, Tm, V, W, Y, Yb, Zn, Zr  
+### Properties included  
+energy above hull, electronic band gap  
+<br>
+<hr>  
+
+# Usage  
+- `ds.parquet` : Aggregated dataset information.  
+- `co/` directory: Configuration rows each include a structure, calculated properties, and metadata.  
+- `cs/` directory : Configuration sets are subsets of configurations grouped by some common characteristic. If `cs/` does not exist, no configurations sets have been defined for this dataset.  
+- `cs_co_map/` directory : The mapping of configurations to configuration sets (if defined).  
+<br>
+#### ColabFit Exchange documentation includes descriptions of content and example code for parsing parquet files:  
+- [Parquet parsing: example code](https://materials.colabfit.org/docs/how_to_use_parquet)  
+- [Dataset info schema](https://materials.colabfit.org/docs/dataset_schema)  
+- [Configuration schema](https://materials.colabfit.org/docs/configuration_schema)  
+- [Configuration set schema](https://materials.colabfit.org/docs/configuration_set_schema)  
+- [Configuration set to configuration mapping schema](https://materials.colabfit.org/docs/cs_co_mapping_schema)  

co/co_0.parquet

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+oid sha256:3d5446ae46b91779696a1d901a2ab972a0807abea9cf33deadd67d53c49543a6
+size 303522057

co/co_1.parquet

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+oid sha256:93177dfae41e91a50e816afd6b6256b918e9783066037d058de6215e5a8b5276
+size 25362742

ds.parquet

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+oid sha256:e45466458e09fa357bb1854f627dc158c90b74dda0e654590e945ecc9ab0bb5a
+size 19824